+
+if ( ! function_exists( 'twentyfifteen_the_custom_logo' ) ) :
+/**
+ * Displays the optional custom logo.
+ *
+ * Does nothing if the custom logo is not available.
+ *
+ * @since Twenty Fifteen 1.5
+ */
+function twentyfifteen_the_custom_logo() {
+ if ( function_exists( 'the_custom_logo' ) ) {
+ the_custom_logo();
+ }
+}
+endif;